申请人:——
公开号:US20010054209A1
公开(公告)日:2001-12-27
A method for dyeing cellulosic materials with reactive dye by pretreating the fabric with a polycationic polymeric agent which is desirably also polynucleophilic is disclosed. The agent can be a polyquaternary amine material especially a poly(DADMAC) or polyvinylpyridine, particularly one including nucleophilic sites such as primary amino groups, e.g. polyallylamine/DADMAC copolymers and polyvinylpyridines quaternisied with w-aminoalkyl groups. The dyes can react with the nucleophilic centres so dyebath exhaustion can be driven by dye fixation rather than substantivity to the substrate. The need to use of salts to drive substantivity can be obviated and post dyeing washing to remove unreacted/hydrolysed dye is much simplified. Material dyed by the method has the good wash fastness properties of materials dyed using reactive dyes. A wide variety of cellulosic substrates can be dyed including lyocell fibre materials and blend/union materials with polyamides.
本发明公开了一种用活性染料对纤维素材料进行染色的方法,即用一种最好也具有亲核性的聚阳离子聚合物剂对织物进行预处理。该剂可以是聚季胺类材料,特别是聚(DADMAC)或聚乙烯吡啶,尤其是包括亲核位点(如伯氨基)的材料,如聚烯丙基胺/DADMAC 共聚物和用 w-氨基烷基季铵化的聚乙烯吡啶。染料可与亲核中心发生反应,因此染浴耗尽可由染料固着而不是基质的吸附性来驱动。这样就不需要使用盐来驱动固着性,染色后清洗去除未反应/水解染料的过程也大大简化。用这种方法染色的材料与用活性染料染色的材料相比,具有良好的耐洗牢度特性。可对多种纤维素基材进行染色,包括纤维素纤维材料和与聚酰胺的混纺/复合材料。